text: const router = require('express').Router()
  module.exports = router
  
  router.get('/', (req, res, next) => {
    try {
      if (req.session.selectedProblem) {
        res.json(req.session.selectedProblem)
      } else {
        res.send('none')
      }
    } catch (err) {
      next(err)
    }
  })
  